linux-kernel - libperf: lack of interface

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Message-ID: <OSBPR01MB460016842A4310264B1CC5A0F7CD9@OSBPR01MB4600.jpnprd01.prod.outlook.com>
Date:   Wed, 1 Sep 2021 09:45:10 +0000
From:   "nakamura.shun@...itsu.com" <nakamura.shun@...itsu.com>
To:     "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "acme@...nel.org" <acme@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "jolsa@...hat.com" <jolsa@...hat.com>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        Rob Herring <robh@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>
Subject: libperf: lack of interface

Hello.

I'm trying to change rdpmc test in perf_event_tests[1] to use libperf, but libperf doesn't have enough interfaces.
Does anyone plan to implement any of these libperf features?

- Interfaces that can run ioctl (PERF_EVENT_IOC_RESET) from userland
- Interfaces that can run fcntl (SIGIO) from userland

[1] https://github.com/deater/perf_event_tests/tree/master/tests/rdpmc


Thanks.
Shunsuke